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地质论评  2005 

粤西河台金矿床富硫化物含金石英脉锆石U-Pb测年及成矿意义

Keywords: 金矿床成矿作用富硫化物含金石英脉单颗粒锆石U-Pb同位素成矿年龄区域构造作用地质条件

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Abstract:

河台金矿是一个强烈受韧性剪切带控制的金矿床,金的成矿主要发生在热液蚀变成矿期的金石英脉阶段和金硫化物阶段,形成的矿石有蚀变糜棱岩型和富硫化物石英脉型.富硫化物含金石英脉中单颗粒锆石U-Pb同位素测年显示早加里东期是河台金矿床主成矿期,成矿年龄为492±16Ma;矿区燕山期伍村花岗岩的单颗粒锆石年龄为153.6±2.1Ma;结合已有的同位素资料,认为河台金矿床是华南加里东期构造-变质-岩浆作用及成矿作用的一个组成部分,是一个早加里东期造山作用同期的造山带型金矿床,并可能有燕山期的热液叠加成矿作用.

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